An environmental agency worries that many cars may be violating clean air emissions standards The...
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An environmental agency worries that many cars may be violating clean air emissions standards The agency hopes to check a sample of vehicles in order to estimate that percentage with a marg of error of 4 and 99 confidence To gauge the size of the problem the agency first picks 40 cars and finds 10 with faulty emissions systems How many should be sampled for a full investigatio The environmental agency should sample at least Round up to the nearest whole number vehicles
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